#include<iostream> using namespace std; int main(){ int num1,num2; char op; cin>>num1>>op>>num2; switch(op){ case '*' : cout<<num1 * num2<<endl; break; case '+' : cout<<num1 + num2<<endl; break; case '-' : cout<<num1 - num2<<endl; break; case '/' : cout<<num1 - num2<<endl; break; } }